Heating device



W. F. CLARK.

HEANNG DEVICE. APPucATlfnN FILED AUG. i. i918.

1,322,761 .Patented Nov. 2.5, 1919.

UNITED STATES PATENT OFFICE.

WARREN F. CLARK, 0F CLEVELAND, OHIO, ASSIGNOR TG THE STEAM ELECTRICPRQDUCTS COMPANY, A CCRFORATION OF OHIO,

HEATING DEVICE.

Specification of Letters Patent.

Patented, Nov. 25, 1919.

Application filed .august 1, 1918. Serial No. 247,744.

To all whom it may concern:

Be it known that I, `WARREN F. CLARK, a citizen of the United States,res ling. at Cleveland, in the county of Cuyahoga and State of Ohio,have invented a certain new and useful improvement in Heating Devices,of which the following is a tulholear, and exact description.

This invention relates to a water heating device having a. heatingelement arranged to heat the water in the device and provided with acontrol mechanism which automatically controls the functioning of theheating element in accordance with certain predetermined conditionswhich may be etfected within the water heating device.

More particularly the disclosure herein embodies the invention in theform of a portablg heat radiating device, in-which the heat to beradiated is furnished by hot water or steam, held within a suitablecontainer, in connection with an electrical heating element, thefunctioning` of which is controlled by a. regulator, which in turn isactuated in accordance with pressure conditions within the water or.steam container. A Generally speaking the invention may be said tocomprise elements and combinations thereorn set forth in theaccompanying claims.

Reference should be had to the accompanying drawings forming `a part ofthe specification, in which Figure 1 is an elevation with portions insection showing my invention embodied' in a portable heat radiatingdevice; Fig. 2 is a top plan View ot portions of the device shown inFig. l; Fig. 3 is an elevation with portions removed showing a part ofthe regulating device.

As before stated, I have chosen as a means tor presenting my invention,an embodiment of the invention comprising a portable heat radiatingdevice having a. regulating deviceI which automatically controls thefunctioning of a heating element in accordy. ance with pressureconditions extant within the heat radiating device proper.

1t will be apparent that the specilic ein- 'bodiment, which is about tobe described, is but one of various forms in which the invention may beembodied, and, therefore, no limitation as to the embodiment of theinvention is intended, except as clearly specied in the claims.

Referring to the drawings; l indicates a suitable casing, which isprovided with a top portion 2. There is alsoa base portion generallyindicated at 3, the upper part of the base portion 3 serving as a watercon tainer asindicated at 4. The lower part of the base portion has apart indicated atv 5,

which is adapted to receive a heating ele ment G. The heating element issupported by suitable brackets 7, carried by the base portion, 4and theheatino' element is maintained in connection with the lower surface orwall of the reservoir 4: by means of setscrews 8, wlhich are threadedthrough the brackets 7.

The heating element in the embodiment shownis electrically energized,and without descending to detail of construction, because the particularconstruction of the heating element forms no part of the presentinvention, it may be said that the heating element at the top thereof,is made up of suitable resistance 'Wires 9, embedded in suitablematerial which is non-conducting, both with respect to the electriccurrent and with respect to heat. The terminals of the coil wires 9 areconnected with the binding posts 10.

The top 2 may, if desired, be equipped with a bail such as indicated at2, vby which the heating device may be lifted and transported from placeto place.

Within the casing 1 there is a coil of pipe 12. This coil of pipe is atone end connected with a suitable vertically extending pipe 13,

the last mentioned pipe communicating.

with a fixture or steam chamber 14, which in turn is secured in theupper wall or top o2 the reservoir il.

The lower end of the coil 12 is connected with a pipe 15, which alsoextends Within the reservoir 4, to a point which is adjacent and meltedat a predetermined temperature, which temperature will be below thedanger point, so that the plug Will melt before the temperature Wouldrise sufficiently high to cause explosion.

Communicating with the reservoir 4:, at a place above the level of thewater contained therein, is a conduit or pipe 16, which is in opencommunication with a regulator, which is generally indicated at 17.

This regulator comprises a flexible tube 1S, which is a tube known asthe Bourdon tube, the operation of which is very well understood.

This tube is connected with a pin 19, and the pin 19 is, by suitablemechanism generally indicated at 20, adapted for connecting with a dialsuch as is usually and commonly used with pressure indicating devices.

The pin 19 is adapted to engage with a flexible member 2Q, which carriesa contact 23. This contact 23 ei'igages with the contact The memberswhich carry the contacts 23 and 21 are so mountedas to be insulated Jromeach other and the contact members are. by the wires and 2G con- 1nected with binding posts 27 and 28, these binding posts heilig adaptedto receive wires 29 and 30.

The wires 29 and 30 are connected with a source of supply which is notshown and eontinuations of the wires 29 and 30, as indicated at 29 and30, are connected with the binding posts 10 of the heatingy element. Thewires 30 and Q9 are connected with thel binding posts 27 and 28, whilethe wires 29 and 3th are directly connected within the regulator 17. Thecontact members 2:5 and 2li are so to speak, electrically inserted inone side of the circuit represented by thel wires 29 and 30, so thatwhen the contacts 23 and 2l are separated the circuit to the heat-ingelement is broken and thereby the supply of current stopped.

As is well understood, one end oiI the Bourdon tube 18 is incommunication with the pipe 16 and the Bourdon tube 1S is moved to agreater or less degree in accordance with the pressure existing Withinthe reservoir L above the water level. As this pressure increases themovement of the Bourdon tube will cause member 19 to be raised and whenraised a sufi'icient amount will move the contacts 23 and 24 away fromeach other. The an'iount of pressure on the part of the member 19 toeffect the nievement of the contact member may be regulated by thepressure of the thumb-screw 31 upon the member 22.

The operation of the device is as follows: a suita e quantity of Wateris introduced into the reservoir 4, the level of the water being belowthe orifice of the tube 16. Under these conditions, there being nopressure above atmospheric pressure, existing in the reservoir 4, theContact members 23 and 2,4 are together, so that when the wires 29 and30 are connected hwith the source of current the heating element 6 willbe energized and supply heat to the water 4. This heating continues andsteam will utimately be formed, This steam will pass through the member14, thence through vertical pipe 13and through the coil 12. As the steampasses through the coil 12 it will more or less condense and the waterthus formed will` flow through the coil 12 past the check valve 16 andreenter the reservoir 4t through the pipe 15. I

As theheating is continued by the heating element, and the generation ofsteam continues, a pressure above atniospheric pressure will be built upin the upper portion ot' reservoir -l and that pressure acting' on theBourdon tube will, when the pressure is built up sufiiciently, cause thecontacts'P-d and 21 to be parted and the Circui tif the electricheating' element broken. This then automatically stops the functioningot' the heating clement.

As long as the predctcrmined pressure exists within the upper part ofthe reservoir 4- the circuit to the l ating element is held open andobviously as soon as the pressure diminishes below a certain point thecontact members 93 and 21 will again come together, re` tabiishing thecircuit to the heatingq clement. and thus again cause thc application ofheat to the water in reservoir 4.

1tl will thus be apparent that the control of the device is entirelyautomatiiI and that the regulator may he adjusted so as to cause 'theheating' element to cease functioning in accordance with predeterminedpressure contacts within the device. I

Having described my invention, I claim.

1. ln a device el: the character described. the combination with u watercontaining rese'rvoir, heat radiating members mounted upon thereservoir, and in open communication with the interior thereot', aheating device fer heating the reservoir, a regulator havingcommunication. with the water containing reservoir, and responsive topressure conditions therein, said regulator being operatively connectedto the heating device to control the functioning thereof, and a casing'supported by the base and iricluding the heat radiating n'iembers, theregulator being supported without said casing.

2. 1n a device of the character described, the combination with a Watercontaining reservoir, a coil of pipe connected at both its ends withsaid reservoir, a casing mountedupon the base and inclo'sing the saidcoil, a .heating device for heating the reservoir, a regulator mounted-outside of the/Casing and having, a connection which extends throughthe casing into communiing thereo cation with the Water containingreservoir, said regulator being responsive to pressure conditions Withinthe reservoir, the said regulator being operatively com iected with theheatinv device to control the functionin a device of the characterdescribed, the combination with a Watercontaining reservoir, heatradiating members mounted upon said reservoin'and. in open communicationWith the interior thereof, the said reservoir being provided With arecess on -the under side thereof, and an electric heating elementmounted within the said recess, a regulating device .havingcommunication With the Water containing reservoir and responsive topressure conditions therein, said regulator being operatively connectedwith the electric heating device to control the functioning thereof.

t. In a device of the character described, the combination with a watercontaining reservoir, a hollow heat radiating` member in openlcommunication with the reservoir, said reservoir being provided With arecess upon the under side thereof, un electric heating elementoccupying` said recess, a casing mounted upon the said casing andinc-losing the said heat radiatingv member, a regulator positionedoutside of the casing, a connection between the said reservoir and theregulator,` which extends through the casing, said regulator beingresponsive to pressure conditions within the reservoir` said regulatorbeing operatively connected with the electric heating device'to controlthe functioning thereof.

5. In a device of the character described, the combination with a Waterreservoir, a hollow heat radiating member mounted upon the reservoir andin open con'nnunication there\.vith, said reservoir being pro vided witha recess upon the underside the interior of the reservoir, Contactmcmbers associated with the Bourdon tube, said contact members beingelectrically connected with the aforesaid heating element, whereby thefunctioning of the heat-ing element is controlled by the Bourdon tube.

(i. In a device of the character described, the combination with areservoir, a pipe extending substantiall)7 vertical from said reservoir,a coil of pipe, one end of the coil being connected with the end of thevertical pipe, the otherend of the coil extending within the reservoir,an elec-tric heating device located beneath the reservoir and in contactwith a wall of said reservoir.

7. n a device of the character described, the combination with areservoir, an upwardly extending pipe connected with the reservoir, acoil of pipe having one end connected with the upwardly extending pipeand the other end communicating with the interior of the reservoir, aheating' element cooperating with the reservoir, a casing supported b vthe base.

8, A portable heating device comprising a base part, which includes aWater containing reservoir, a heating element associated wilh `thereservoir and means for supporting the heating element, a casingmountedA upon the base portion, a pipe coil Within said casing, theopposite ends of said pipe coil being in communication with the interior of the reservoir.

In testimony whereof, I hereunto aix my signature.

VARREN F. CLARK.

